A basic step in addressing the production of biodiesel is the choice of the feedstock to be used. The use of waste has several advantages: a lower cost of the product; the use of renewable sources contributes reduce CO2 emissions; disposal costs avoid. In this view, a comparative analysis, by using ChemCad software, has been performed in order to evaluate different oil source potentiality to produce biodiesel using acid heterogeneous catalysis. The same analysis has...